Quarterly Journal of the Chemical Society of London, Volume 1, Pages 1-996 |
From inside the book
Results 1-3 of 80
Page 186
... effect on the methyl protons , 18 although data available are too limited to predict the amount of shift for 12 - C1 in the present series . The effect of the 12 - methyl group on the 18 - methyl protons , effect of the 12 - methyl ...
... effect on the methyl protons , 18 although data available are too limited to predict the amount of shift for 12 - C1 in the present series . The effect of the 12 - methyl group on the 18 - methyl protons , effect of the 12 - methyl ...
Page 350
... effect in either o.r.d. or c.d. curves of mole- cules containing a carbonyl group varies with change of solvent.2,3 Variation occurs both in the wavelength of the o.r.d. extrema or of c.d. maxima , and in the intensity of the Cotton effect ...
... effect in either o.r.d. or c.d. curves of mole- cules containing a carbonyl group varies with change of solvent.2,3 Variation occurs both in the wavelength of the o.r.d. extrema or of c.d. maxima , and in the intensity of the Cotton effect ...
Page 427
... effect in two ways : either ( 1 ) by direct perturbation of the chromophore ( contribution of the third sphere , according to the Octant Rule ) , or ( 2 ) by changing the conformation of the five - membered ring ( second sphere effects ) ...
... effect in two ways : either ( 1 ) by direct perturbation of the chromophore ( contribution of the third sphere , according to the Octant Rule ) , or ( 2 ) by changing the conformation of the five - membered ring ( second sphere effects ) ...
Contents
Organic chemistry | 1 |
oestrone | 10 |
Heterocyclic compounds from urea derivatives Part XVI Interaction of carbonohydrazide and carbodi | 19 |
24 other sections not shown
Other editions - View all
Common terms and phrases
absorption acetic acid acetone added adduct alcohol alumina Amer aqueous aromatic band benzene boiled bromide Calc CH₂ chalcone Chem chim chloride chloroform chromatography cm.¹ colourless compound cooled crystallised cyclisation cyclohexane decomp derivatives diluted dimethyl dimethylformamide dioxan distilled doublet dried eluted ester ethanol ethyl acetate EtOH evaporated extracted with ether filtered filtrate Found fraction gave give heated under reflux hydrochloric acid hydrolysis i.r. spectrum identical irradiation isolated isomer ketone light petroleum b.p. lithium aluminium hydride mass spectra methylene mixed m.p. mixture mmoles mole n.m.r. spectrum needles nitrogen Nujol obtained olefin oxidation peak phosphine potassium prepared protons pyridine reaction reagent rearrangement reduced pressure reflux requires residue ring room temperature showed signals silica gel singlet sodium hydroxide solid solution solvent stirred structure synthesis Table tetrahydrofuran VIII yellow yield zygosporin